Image of the Day: Self-Insemination
Image of the Day: Self-Insemination
Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.
Image of the Day: Self-Insemination
Image of the Day: Self-Insemination

Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.

Videos reveal how a female squid fertilizes her eggs—one at a time and without spilling much stored sperm.

sperm storage
Scientists Solve Giant Sperm Paradox
Scientists Solve Giant Sperm Paradox
Tanya Lewis | May 26, 2016
A study reveals why some male fruit flies produce sex cells that are 20 times the length of their bodies.
The Hidden Side of Sex
The Hidden Side of Sex
Patricia L.R. Brennan | Jul 1, 2014
Sexual selection doesn’t end when females choose a mate. Females and males of many animal species employ an array of tactics to stack the deck in their reproductive favor.
Book Excerpt from <em>How We Do It: The Evolution and Future of Human Reproduction</em>
Book Excerpt from How We Do It: The Evolution and Future of Human Reproduction
Robert Martin | Jul 1, 2013
In Chapter 3, “From Mating to Conception,” author Robert Martin explores the question of why humans and other primates frequently engage in sexual intercourse when females are not fertile.
Contributors
Contributors
Kate Yandell | Jul 1, 2013
Meet some of the people featured in the July 2013 issue of The Scientist.
Widening the Fertile Window
Widening the Fertile Window
Robert Martin | Jul 1, 2013
Women may be able to store viable sperm for longer than a week, thus contributing to apparent variability in pregnancy lengths.